The Effect Of Organic- Minerals Of Slowly-release Material On Soil Nutrition And Maize Yields

The corn experiment was conducted in limy soil developed from loess-like mother material with design method of compete random block.It studied slowly releasing effect of soil nutrition in different corn grow fields,corn yields and absording N, P, K.The results showed that:1 .Four kinds of compound of organic-mineral material presented different controlled on soil available N, available P, available K in corn four stages. The order of the effect of releasing available N was sewage sludge +bentonite> sewage sludge+zeolite>HA+ zeolite> HA+ bentonite; The order of the effect of releasing Available P was sewage sludge +bentonite > sewage sludge+zeolite > HA+ bentonite > HA+ zeolite; The order of the effect of releasing available K was sewage sludge +bentonite>HA+ zeolite> HA+ bentonite> sewage sludge+zeolite.2 In the four different releaseing material, HA+ zeolite (F2) improved the structure of maize yield and increased the maize yields by 41.7% compared with CK. The order was HA+ zeolite >HA+ bentonite> sewage sludge+zeolite >sewage sludge + bentonite. From seeing the content of coarse protein, HA+ zeolite (F2) was the best and sewage sludge+ zeolite (N2 ) was the worst.3 The order of different treatment was HA+ zeolite(F2)> HA+ bentonite (F1) >sewage sludge +bentonite (Nl)> sewage sludge + zeolite (N2 ) to total absorbed amount of N and P. HA+ bentonite (Fl) is the best,and sewage sludge +bentonite is the worst to total absorbed amount of K.